Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Chapter 13, Problem 3MCQ
Summary Introduction
Introduction:
Viruses are small organisms which contain the DNA or RNA as their genetic materials. The genetic materials are composed of
RNA-dependent RNA polymerase is an important enzymes that codes in all RNA viruses. It synthesizes the replicate RNA strand from the negative template RNA strand.
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Students have asked these similar questions
If the HIV did not have a reverse transcriptase enzyme, then which of the following would apply?
Select one:
a. The virus can make use of the reverse transcriptase enzyme from the host cell to convert its RNA into
DNA
b. Viral particles will be produced without reverse transcriptase enzyme since the original HIV is an
RNA virus and needs to assemble RNA ant coat proteins together
c. The virus will manufacture its proteins from its RNA using translation and ribosomes from host cell
d. Provirus will not be formed and assembly of viral particles will never occur
e. The virus will not be able to recognise the host cell and therefore entry into the cell is blocked
The HIV virus produces copies of its genome through:
A.
DNA replication
B.
Reverse transcription followed by integration then normal transcription
C.
RNA replication from an RNA template
D.
differential splicing
Which class of RNA is correctly paired with its function?
a. Small nuclear RNA (snRNA): processes rRNA
b. Transfer RNA (tRNA): attaches to an amino acid
c. MicroRNA (miRNA): carries information for the amino acid sequence of a protein
d. Ribosomal RNA (rRNA): carries out RNA interference
Chapter 13 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 13 - Why do we classify viruses as obligatory...Ch. 13 - List the four properties that define a virus, what...Ch. 13 - Describe the four morphological classes of...Ch. 13 - Prob. 4RCh. 13 - Compare biosynthesis of a + stranded RNA and a ...Ch. 13 - Prob. 6RCh. 13 - Why is it difficult to determine the etiology of a...Ch. 13 - Prob. 8RCh. 13 - Plant viruses can be cultured in (c) __________.Ch. 13 - NAME IT Identify the viral family that infects...
Ch. 13 - Prob. 1MCQCh. 13 - The molecule serving as mRNA can be incorporated...Ch. 13 - Prob. 3MCQCh. 13 - Prob. 4MCQCh. 13 - An example of lysogeny in animals could be a. slow...Ch. 13 - The ability of a virus to infect an organism is...Ch. 13 - Which of the following statements is false? a....Ch. 13 - Prob. 8MCQCh. 13 - Prob. 9MCQCh. 13 - Prob. 10MCQCh. 13 - Discuss the arguments for and against the...Ch. 13 - In some viruses, capsomeres function as enzymes as...Ch. 13 - Why was the discovery of simian AIDS and feline...Ch. 13 - Prophages and proviruses have been described as...Ch. 13 - Prob. 1CAECh. 13 - A newborn female developed extensive vesicular and...Ch. 13 - Prob. 3CAE
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- QuestionHuman ribosomes can translate the SARS-CoV2 genome because: A. it is reverse transcribed into a double stranded DNA version of the genome B. it is the equivalent of an mRNA C. it is turned into an mRNA by a virus-encoded enzyme D. Viral ribosomes translate the SARS-CoV2 genome, not human ribosomesarrow_forwardAn experimental drug therapy to treat patients with antibiotic-resistant bacteria involves introduction of a highly specific bacteriophage to the infected patient's bloodstream. Which of the following bacteriophage types would be the LEAST useful for this therapy? a. a lytic bacteriophage b. An enveloped virus c. An RNA virus d. a lysogenic bacteriophagearrow_forwardIn an HIV infection, this enzyme is responsible for copying theRNA information in the virus into DNA.a. integraseb. reverse transcriptasec. DNA polymerased. proteasearrow_forward
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- Nevirapine, an antiretroviral drug used to treat HIV acts as an uncompetitive inhibitor of the viral enzyme, reverse transcriptase (RT). Where does this inhibitor bind to prevent viral replication? Select one: a. The enzyme-substrate complex b. The viral DNA product c. Directly to reverse transcriptase d. The substrate Humans are able to break down amino acids, removing the amino group from the carbon skeleton and excreting waste as urea. Select the correct sequence of events in this metabolic pathway. Select one: a. Transamination, ammonia assimilation, deamination, ammonia metabolism b. Deamination, transamination, ammonia metabolism, ammonia assimilation c. Deamination, ammonia assimilation, transamination, ammonia metabolism d. Transamination, deamination, ammonia assimilation, ammonia metabolismarrow_forwardWhat is the function of reverse transcriptase in retroviruses? O A. It converts host cell RNA into viral DNA. B. It uses viral RNA as a template for making more viral RNA genomes. O. It translates viral RNA into proteins. D. It uses viral RNA as a template for DNA synthesis, that is, it makes complementary DNA.arrow_forwardBacteriophages are viruses that infect bacteria. Depending on the bacteriophage, their genome can be made of either single or double stranded DNA or RNA. The composition of genetic material found in a bacteriophage is found to be 25% A, 33% T, 24% G, and 18% C. What can you conclude about the genetic material of this virus? a. It is double-stranded DNA. b. It is single-stranded DNA. c. It is single-stranded RNA. d. It is double-stranded RNA.arrow_forward
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